Intro

Github

Data

The two data sources used are the “Uniform Crime Reporting” Offenses data and the Oregon 2020 Census data from Portland University.

Crime Data

The crime reporting data set is accessible directly from

https://www.oregon.gov/osp/Pages/Uniform-Crime-Reporting-Data.aspx

Population Data

The Oregon census data can be found at the website

https://www.pdx.edu/population-research/census-data-oregon

Methodology

Results

city black_diff latino_diff native_diff pacific_diff asian_diff other_diff
Portland city 0.1775479 -0.0081562 0.0096021 0.0019667 -0.0574304 0.0022551
Gresham city 0.1559631 -0.0181710 0.0049981 0.0003788 -0.0354360 0.0109272
Tigard city 0.0979545 -0.0519784 0.0089440 0.0057124 -0.0634898 0.0500510
Beaverton city 0.0890202 0.0289533 0.0040674 0.0021812 -0.1029544 0.0267245
Durham city 0.0857441 -0.0210637 0.0017665 -0.0172110 -0.0191598 0.0106359
Tualatin city 0.0633784 -0.0070094 0.0050006 0.0346845 -0.0238777 0.0468155

Result Visualiazion

Map plots of each racial bias

Black arrest bias map.

Correlation Analysis

We want to inspect potential correlations between racial population density and arrest biases. First we will inspect the data to see what type of corelations we may want to perform. From the QQ plots we see most of the data series are not normally distributed. See Appendix A3 for all the plots. So we will perform a Spearman’s correlation since the data does not meet the assumptions of the Pearson’s correlation test. # Spearman Correlation matrix

Closer inspection of data fields with statistically significant correlation values.

## `geom_smooth()` using formula 'y ~ x'

## `geom_smooth()` using formula 'y ~ x'

## `geom_smooth()` using formula 'y ~ x'

## `geom_smooth()` using formula 'y ~ x'

Sources

Oregon Crime Data

“Oregon State Police: Uniform Crime Reporting”

https://www.oregon.gov/osp/Pages/Uniform-Crime-Reporting-Data.aspx

Oregon Census Data

“Census Data for Oregon” Population Research Center

https://www.pdx.edu/population-research/census-data-oregon 

Direct link for data set:

https://drive.google.com/uc?export=download&id=1JrrmYiQUBPux8nnJ88epAAk9U5rbRDBD
FBI

“FBI-Violent Crime” FBI: UCR

https://ucr.fbi.gov/crime-in-the-u.s/2019/crime-in-the-u.s.-2019/topic-pages/violent-crime

Oregon Spatial Data Library

“Oregon Counties - 2015”

https://spatialdata.oregonexplorer.info/geoportal/details;id=361c06fee9de4e24a72e280fb386a771

Appendi A1 Result Table

city black_diff latino_diff native_diff pacific_diff asian_diff other_diff white_diff
Albany city 0.0219080 -0.0479248 -0.0057834 -0.0023034 -0.0104086 0.0046077 0.0938700
Ashland city 0.0272064 -0.0468150 -0.0035888 0.0004215 -0.0152863 0.0034937 0.0900060
Astoria city 0.0236614 -0.0181890 -0.0074060 -0.0005554 -0.0105394 0.0163879 0.0523206
Beaverton city 0.0890202 0.0289533 0.0040674 0.0021812 -0.1029544 0.0267245 0.0108383
Canby city 0.0363275 -0.0171796 -0.0045363 0.0003424 -0.0120996 0.0297832 0.0133592
Central Point city 0.0218978 -0.0634285 -0.0047254 -0.0007728 -0.0072944 0.0144257 0.0924388
Coos Bay city 0.0104328 -0.0466396 -0.0038633 -0.0008332 -0.0152193 0.0014391 0.1169996
Cornelius city 0.0359101 -0.1252862 0.0020102 0.0002792 -0.0150479 0.0114812 0.1262702
Corvallis city 0.0427724 -0.0200813 0.0024083 -0.0014403 -0.0882549 0.0120713 0.1096036
Dallas city 0.0232704 -0.0051216 -0.0099940 0.0028297 -0.0073790 0.0694612 -0.0245186
Eugene city 0.0569202 -0.0647195 0.0006728 -0.0025293 -0.0365916 0.0015371 0.1081902
Gladstone city 0.0477583 -0.0441702 -0.0010939 -0.0018907 -0.0017546 0.0230005 0.0356243
Grants Pass city 0.0133260 -0.0291645 -0.0066572 -0.0001223 -0.0106954 0.0327994 0.0595479
Gresham city 0.1559631 -0.0181710 0.0049981 0.0003788 -0.0354360 0.0109272 -0.0590437
Hermiston city 0.0288144 -0.0836929 0.0108989 -0.0013711 -0.0108996 0.0018595 0.0894422
Hillsboro city 0.0495899 0.0414056 0.0042882 -0.0000232 -0.1169413 0.0138497 0.0612820
Hood River city 0.0106477 -0.0398128 0.0570045 0.0016845 -0.0205420 0.1514733 -0.1173093
Keizer city 0.0331169 -0.0147770 -0.0037847 0.0002610 -0.0113163 0.0571888 -0.0045305
La Grande city 0.0112787 -0.0264811 -0.0042744 0.0000620 -0.0032673 0.0051539 0.0983285
Lake Oswego city 0.0554664 0.0204363 0.0008123 0.0045821 -0.0574355 0.0249205 -0.0052392
Lincoln City city 0.0308455 -0.0222559 0.0019009 -0.0009249 -0.0062827 0.0821195 -0.0262385
Medford city 0.0425625 -0.1014369 -0.0029203 -0.0016793 -0.0173741 0.0053747 0.1366091
Milwaukie city 0.0563064 -0.0580298 0.0032072 0.0033073 -0.0107399 0.0362037 0.0299018
Molalla city 0.0053050 -0.0955633 -0.0044364 0.0020464 -0.0083427 0.0326781 0.1200370
Mount Angel city 0.0257201 0.1174529 -0.0028168 0.0099883 -0.0036014 0.0218676 -0.1297720
Newberg city 0.0324808 0.0265783 -0.0010112 0.0025052 -0.0104763 0.0011268 0.0032122
Dundee city 0.0375316 0.0365456 0.0001313 0.0025146 -0.0045529 0.0005366 -0.0333877
Newport city 0.0164805 -0.0764491 0.0258078 0.0013199 -0.0166029 0.1024149 0.0010766
Ontario city 0.0309899 -0.3590707 0.0015324 -0.0000107 -0.0207552 -0.0006217 0.3851915
Oregon City city 0.0351976 -0.0264617 -0.0018572 0.0022086 -0.0114948 0.0219092 0.0359716
Pendleton city 0.0127693 -0.0594187 0.1483630 -0.0005456 -0.0070844 -0.0011662 -0.0501323
Philomath city 0.0155518 -0.0486866 -0.0009599 -0.0005154 -0.0124471 0.0274526 0.0778616
Phoenix city 0.0044905 -0.0973220 -0.0025737 0.0004770 -0.0136342 0.0082897 0.1493908
Portland city 0.1775479 -0.0081562 0.0096021 0.0019667 -0.0574304 0.0022551 -0.0631213
Reedsport city 0.0137314 -0.0354702 0.0140279 0.0071283 -0.0064590 0.0560641 -0.0006308
Roseburg city 0.0121818 -0.0406508 -0.0058161 -0.0005494 -0.0156044 -0.0005893 0.1070369
Salem city 0.0528040 -0.0515928 -0.0010441 0.0045233 -0.0223391 0.0205018 0.0547593
Seaside city 0.0245657 -0.0687073 -0.0041417 0.0000847 -0.0159526 0.0835231 0.0299470
Sherwood city 0.0481243 -0.0169153 0.0048553 0.0018514 -0.0257099 0.0902980 -0.0496444
Springfield city 0.0465052 -0.0882439 -0.0085353 -0.0036848 -0.0100009 -0.0024426 0.1299046
Stanfield city 0.0075356 -0.0964365 0.0189726 -0.0002673 -0.0021684 0.0020003 0.1197934
Stayton city 0.0086999 -0.0693156 -0.0096718 0.0007800 -0.0077423 0.0379747 0.0978054
Sweet Home city 0.0082515 -0.0337289 -0.0105359 -0.0005883 -0.0052021 0.0084639 0.1008325
Talent city 0.0250350 -0.0875603 -0.0005958 0.0014409 -0.0124695 -0.0044598 0.1274889
The Dalles city 0.0085329 -0.0443685 0.0446626 -0.0003972 -0.0076519 0.0150557 0.0344167
Tigard city 0.0979545 -0.0519784 0.0089440 0.0057124 -0.0634898 0.0500510 0.0124552
Tualatin city 0.0633784 -0.0070094 0.0050006 0.0346845 -0.0238777 0.0468155 -0.0581640
Umatilla city -0.0017284 -0.1003254 -0.0032772 0.0028794 -0.0051668 0.0038039 0.1205883
Warrenton city 0.0049022 -0.0364269 -0.0021937 -0.0030394 -0.0175967 0.0760794 0.0405952
Durham city 0.0857441 -0.0210637 0.0017665 -0.0172110 -0.0191598 0.0106359 0.0385803
West Linn city 0.0489069 0.0133775 0.0085253 0.0103611 -0.0349680 0.0389043 -0.0345732
Winston city 0.0121672 -0.0339838 -0.0040406 0.0003535 -0.0065561 -0.0031432 0.0937977
Woodburn city 0.0104018 0.1609522 -0.0025352 -0.0003854 -0.0060511 0.0044525 -0.1413604

Appendex A2 Maps

Asian arrest bias map. Black arrest bias map. Latino arrest bias map. Native arrest bias map. Other arrest bias map. Pacific arrest bias map. White arrest bias map.

Appendix A3 Data Distributions

Appendix B

source code available at https://github.com/russl-corey/Oregon_Crime

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

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